﻿#region Copyright (c) 2007-2011 SmartVault Corporation, all rights reserved.
// 
// http://www.opensource.org/licenses/mit-license.php
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// 
#endregion
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Xml.Serialization;

namespace CRMStore
{
    public class CRMDatabaseLoader
    {
        private static CRMDatabaseLoader _instance;
        private CRMDatabase _database;

        private string _path;

        private CRMDatabaseLoader()
        {
            _path = Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData);
            _path = Path.Combine(_path, "Sample-CRM");

            if (!Directory.Exists(_path))
            {
                Directory.CreateDirectory(_path);
            }

            _path = Path.Combine(_path, "Database.xml");

            if (!File.Exists(_path))
            {
                _database = new CRMDatabase();
                Save();
            }
            else
            {
                Load();
            }
        }

        public static CRMDatabaseLoader Instance
        {
            get
            {
                if (_instance == null)
                {
                    _instance = new CRMDatabaseLoader();
                }

                return _instance;
            }
        }

        private void Load()
        {
            XmlSerializer serializer = new XmlSerializer(typeof(CRMDatabase));

            using (TextReader reader = new StreamReader(_path))
            {
                _database = (CRMDatabase)serializer.Deserialize(reader);
            }
        }

        public void Save()
        {
            XmlSerializer serializer = new XmlSerializer(typeof(CRMDatabase));

            using (TextWriter writer = new StreamWriter(_path))
            {
                serializer.Serialize(writer, Data);
            }
        }

        public CRMDatabase Data
        {
            get
            {
                return _database;
            }
        }
    }
}
